Bluelab Multimedia pH Meter – Digital Soil and Root Zone pH Meter with Leap Probe

The Bluelab Multimedia pH Meter is a professional portable pH testing instrument designed to measure pH directly in soil, coco coir, rockwool, and other compatible growing media, as well as hydroponic nutrient solutions. It helps growers evaluate root zone conditions and identify pH imbalances that may affect nutrient availability and plant development.

Equipped with the Bluelab Leap pH Probe, featuring a reinforced spear tip and double-junction electrode, the meter allows direct measurements in suitably moist substrates without routinely preparing soil extracts.

Its backlit digital display, simple calibration system, and battery-powered design make it a practical choice for indoor cultivation, commercial greenhouses, nurseries, and professional horticulture.

Direct Root Zone pH Measurement with the Leap Probe

Maintaining the appropriate pH in the root zone helps ensure essential nutrients remain available for plant uptake.

The Bluelab Multimedia pH Meter uses a replaceable Leap pH Probe designed to test a variety of growing media, including:

• Soil and potting mixes
• Coco coir and coco-based substrates
• Rockwool and other compatible horticultural media
• Hydroponic nutrient solutions
• Irrigation water and liquid samples

Its reinforced spear tip allows the probe to be inserted into appropriately prepared growing media. The included dibber (auger) can be used to create an insertion hole in compact or delicate substrates.

The meter measures pH from 0.0 to 14.0, with a resolution of 0.1 pH and accuracy of ±0.1 pH at 25°C.

Important: Reliable direct substrate measurements require sufficient moisture and proper contact between the sensing tip and the growing medium.

Key Features and Benefits

• Direct Substrate pH Testing: Measures pH in compatible growing media and nutrient solutions.

• Reinforced Leap pH Probe: Features a durable spear-tip design for root zone measurements.

• Double-Junction Electrode: Designed for dependable horticultural pH testing.

• Replaceable Probe: Standard BNC connection allows the sensor to be replaced independently.

• Backlit Digital Display: Provides clear readings in different lighting conditions.

• Two-Point pH Calibration: Supports calibration using pH 7.0 and pH 4.0 reference solutions.

• 30-Day Calibration Reminder: Helps maintain an appropriate maintenance schedule.

• Two-Metre Probe Cable: Offers flexibility when measuring hard-to-reach plants and containers.

• Automatic Power-Off: Helps conserve battery life between measurements.

• Portable Battery Operation: Convenient for testing multiple plants and cultivation areas.

How to Use the Bluelab Multimedia pH Meter

Step 1 – Prepare the Meter

Install the supplied batteries and connect the Leap pH Probe using its BNC connector.

Before first use, condition the probe according to Bluelab's instructions and calibrate it using fresh pH reference solutions.

Step 2 – Prepare the Growing Medium

Choose a representative testing location close to the plant's root zone.

If the substrate is dry, moisten the measurement area with a small amount of distilled water, as recommended by Bluelab.

Use the supplied dibber when an insertion hole is needed.

Step 3 – Insert the Leap pH Probe

Carefully insert the probe into the prepared growing medium, ensuring that the sensing tip makes good contact with the substrate.

Avoid excessive sideways pressure that could damage the electrode.

Step 4 – Read the Measurement

Turn on the meter and allow the displayed pH value to stabilize before recording the result.

For liquid samples, immerse the sensing tip in the solution according to the manufacturer's instructions.

Step 5 – Clean and Store

Rinse the probe tip with fresh tap water after testing to remove substrate particles and fertilizer residue.

Replace the protective storage cap containing an appropriate KCl probe storage solution to keep the electrode hydrated.

Technical Specifications

Measurement accuracy is specified at 25°C (77°F). Bluelab's published technical table also lists temperature specifications, although the product is primarily marketed and documented as a pH meter rather than a dedicated temperature-testing instrument.

What's Included?

The standard Bluelab Multimedia pH Meter package includes:

• 1 × Bluelab Multimedia pH Meter
• 1 × Bluelab Leap pH Probe
• 1 × Dibber (Auger) for preparing insertion holes
• 1 × 18 mL Bluelab pH 7.0 Calibration Solution Sachet
• 1 × 18 mL Bluelab pH 4.0 Calibration Solution Sachet

The meter operates with two AAA alkaline batteries, which Bluelab identifies as supplied with the instrument.

Additional calibration and KCl storage solutions are available separately.

Calibration and Probe Maintenance

Regular cleaning, calibration, and proper storage are essential for accurate pH measurements.

Bluelab recommends calibrating the Leap pH Probe using pH 7.0 and pH 4.0 solutions, or pH 10.0 when appropriate for the measurement application.

The calibration indicator remains visible for approximately 30 days after successful calibration. Once it disappears, the probe should be cleaned and recalibrated.

For frequent testing in abrasive media such as soil and potting mixes, more frequent calibration may be necessary.

Always keep the electrode hydrated with Bluelab KCl Storage Solution. Do not store the probe in distilled, deionized, or reverse-osmosis water.

Avoid bending the probe, applying sideways pressure, or forcing it into hard, compacted material.

If the Leap pH Probe becomes damaged or no longer calibrates correctly despite appropriate cleaning and hydration, it can be replaced without purchasing a new meter.

Frequently Asked Questions About the Bluelab Multimedia pH Meter

Can the Bluelab Multimedia pH Meter measure pH directly in soil?

Yes. The reinforced Leap pH Probe is designed for direct pH measurements in sufficiently moist soil and other compatible growing media.

Can the meter be used in coco coir and rockwool?

Yes. The Bluelab Multimedia pH Meter supports pH measurements in coco coir, rockwool, potting mixes, and other suitable substrates.

Does the Bluelab Multimedia pH Meter measure EC?

No. This model is intended for pH testing. Growers who also need electrical conductivity and temperature measurements should consider the Bluelab Combo Meter with Leap pH Probe.

Can the Leap pH Probe be used in nutrient solutions?

Yes. The probe can be used to measure pH in hydroponic nutrient solutions, irrigation water, and other compatible liquids.

Does the meter require regular calibration?

Yes. The pH probe requires regular cleaning and two-point calibration. The meter includes a 30-day calibration reminder.

What is the difference between the Multimedia pH Meter and the Combo Meter with Leap pH Probe?

Both instruments support direct root zone pH measurement using a Leap pH Probe. The Combo Meter with Leap pH Probe additionally includes a conductivity/temperature probe for analyzing nutrient solutions.

Can you replace the Leap pH Probe?

Yes. It has a standard BNC connector and can be replaced separately when necessary.